the you in constitutional talks are wrapping up, but no end is in -- no agreement is in sight -- the united nations constitutional talks in doha are wrapping up, but no agreement is in sight. >> cairo is in crisis again. protesters have broken through a barricade surrounding the presidential palace. >> the barbwire was put in place after street battles between president morsi's supporters and opponents turn violent this week. >> finding a political solution to the crisis will not be easy, either. egypt's main opposition parties announced they will not take part in a national dialogue propose. >> the president called for talks from all sides to end the disputes. >> the atmosphere in front of the presidential palace is tense amid fears of more violence. thousands of anti-morsi demonstrators marched toward the palace after friday prayers. some groups called for the president to stand down. many are furious and believe he has put himself above the law. >> we want a free egypt. we won an agent for everybody. >> morsi is refusing to back up to pressure. and in the nation is ready for the referend